DOFMaster for iPhone and iPod touch

Use DOFMaster to calculate the depth of field in your photographs.  You'll be able to select the lens and f/stop combination that provides the zone of sharpness you need.  Use it to calculate the hyperfocal distance for landscape photography.

Web Application - Go to http://iphone.dofmaster.com on your iPhone or iPod touch to use the web app. (That link only works for the iPhone and iPod touch. Click here if you are using any other web browser.)